Uploading large images using Base64 and JSON - ios

I am using this function to upload an image to a server using JSON. In order to do so, I first convert the image to NSData and then to NSString using Base64. The method works fine when the image is not very large but when I try to upload a 2Mb image, it crashes.
The problem is that the server doesn't receive my image even though the didReceiveResponse method is called as well as the didReceiveData which returns (null). At first I thought it was a time out issue but even setting it to 1000.0 it still doesn't work. Any idea? Thanks for your time!
Here's my current code:
- (void) imageRequest {
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:#"http://www.myurltouploadimage.com/services/v1/upload.json"]];
NSString *docDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *path = [NSString stringWithFormat:#"%#/design%i.png",docDir, designNum];
NSLog(#"%#",path);
NSData *imageData = UIImagePNGRepresentation([UIImage imageWithContentsOfFile:path]);
[Base64 initialize];
NSString *imageString = [Base64 encode:imageData];
NSArray *keys = [NSArray arrayWithObjects:#"design",nil];
NSArray *objects = [NSArray arrayWithObjects:imageString,nil];
NSDictionary *jsonDictionary = [NSDictionary dictionaryWithObjects:objects forKeys:keys];
NSError *error;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:jsonDictionary options:kNilOptions error:&error];
[request setHTTPMethod:#"POST"];
[request setValue:[NSString stringWithFormat:#"%d",[jsonData length]] forHTTPHeaderField:#"Content-Length"];
[request setValue:#"application/json" forHTTPHeaderField:#"Accept"];
[request setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
[request setHTTPBody:jsonData];
[[NSURLConnection alloc] initWithRequest:request delegate:self];
NSLog(#"Image uploaded");
}
- (void) connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
NSLog(#"didReceiveResponse");
}
- (void) connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
NSLog(#"%#",[NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil]);
}

I finally decided to upload the Base64 image splitting it into smaller substrings. In order to do so, and as I needed many NSURLConnections, I created a subclass named TagConnection which gives a tag for each connection so that there's no possible confusion between them.
Then I created a TagConnection property in MyViewController with the purpose of accessing it from any function. As you can see, there's the -startAsyncLoad:withTag: function that allocs and inits the TagConnection and the -connection:didReceiveData: one which deletes it when I receive a response from the server.
Referring to the -uploadImage function, firstly, it converts the image into string and then splits it and put the chunks inside the JSON request. It is called until the variable offset is larger than the string length which means that all the chunks have been uploaded.
You can also prove that every chunk has been successfully uploaded by checking the server response every time and only calling the -uploadImage function when it returns success.
I hope this has been a useful answer. Thanks.
TagConnection.h
#interface TagConnection : NSURLConnection {
NSString *tag;
}
#property (strong, nonatomic) NSString *tag;
- (id)initWithRequest:(NSURLRequest *)request delegate:(id)delegate startImmediately:(BOOL)startImmediately tag:(NSString*)tag;
#end
TagConnection.m
#import "TagConnection.h"
#implementation TagConnection
#synthesize tag;
- (id)initWithRequest:(NSURLRequest *)request delegate:(id)delegate startImmediately:(BOOL)startImmediately tag:(NSString*)tag {
self = [super initWithRequest:request delegate:delegate startImmediately:startImmediately];
if (self) {
self.tag = tag;
}
return self;
}
- (void)dealloc {
[tag release];
[super dealloc];
}
#end
MyViewController.h
#import "TagConnection.h"
#interface MyViewController : UIViewController
#property (strong, nonatomic) TagConnection *conn;
MyViewController.m
#import "MyViewController.h"
#interface MyViewController ()
#end
#synthesize conn;
bool stopSending = NO;
int chunkNum = 1;
int offset = 0;
- (IBAction) uploadImageButton:(id)sender {
[self uploadImage];
}
- (void) startAsyncLoad:(NSMutableURLRequest *)request withTag:(NSString *)tag {
self.conn = [[[TagConnection alloc] initWithRequest:request delegate:self startImmediately:YES tag:tag] autorelease];
}
- (void) uploadImage {
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:#"http://www.mywebpage.com/upload.json"] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:1000.0];
NSString *docDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *path = [NSString stringWithFormat:#"%#/design%i.png", docDir, designNum];
NSLog(#"%#",path);
NSData *imageData = UIImagePNGRepresentation([UIImage imageWithContentsOfFile:path]);
[Base64 initialize];
NSString *imageString = [Base64 encode:imageData];
NSUInteger length = [imageString length];
NSUInteger chunkSize = 1000;
NSUInteger thisChunkSize = length - offset > chunkSize ? chunkSize : length - offset;
NSString *chunk = [imageString substringWithRange:NSMakeRange(offset, thisChunkSize)];
offset += thisChunkSize;
NSArray *keys = [NSArray arrayWithObjects:#"design",#"design_id",#"fragment_id",nil];
NSArray *objects = [NSArray arrayWithObjects:chunk,#"design_id",[NSString stringWithFormat:#"%i", chunkNum],nil];
NSDictionary *jsonDictionary = [NSDictionary dictionaryWithObjects:objects forKeys:keys];
NSError *error;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:jsonDictionary options:kNilOptions error:&error];
[request setHTTPMethod:#"POST"];
[request setValue:[NSString stringWithFormat:#"%d",[jsonData length]] forHTTPHeaderField:#"Content-Length"];
[request setValue:#"application/json" forHTTPHeaderField:#"Accept"];
[request setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
[request setHTTPBody:jsonData];
[self startAsyncLoad:request withTag:[NSString stringWithFormat:#"tag%i",chunkNum]];
if (offset > length) {
stopSending = YES;
}
}
- (void) connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
NSError *error;
NSArray *responseData = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
if (!responseData) {
NSLog(#"Error parsing JSON: %#", error);
} else {
if (stopSending == NO) {
chunkNum++;
[self.conn cancel];
self.conn = nil;
[self uploadImage];
} else {
NSLog(#"---------Image sent---------");
}
}
}
#end

Please don't think this is the last option, this is just my observation.
I think you should send that NSData in chunks instead of complete Data.
I have seen such methodology in YouTube Video Uploading case.They send the Large set of NSData (NSData of Video File) in Chunks of many NSData.
They uses the Same Methodology for uploading the large data.
So should do google about the Youtube data Uploading API.And you should search out that method , YouTube Uploader Uses.
I hope it may help you .

Related

How to pass multiple parameters in URL to web View in iOS?

I have following dictionary:
NSDictionary *param = #{#"schoolid":#"schooldb1",
#"token":del.tokenString,
#"mobile":del.phoneString
};
NSLog(#"param:%#",param);
I want to send this parameters (schoolid, token, mobile) to web view. But I don't know how to send that. I tried to search on internet but I didn't get any proper solution for my question.
My main URL is:
NSString *url=#"https://MyURL.com/School/AppSingleTrack";
and I'm going to call UIWebview like following:
NSString *finalurl=[NSString stringWithFormat:#"https://MyURL.com/School/AppSingleTrack/?%#",param];
NSURL *nsurl=[NSURL URLWithString:finalurl];
NSURLRequest *nsrequest=[NSURLRequest requestWithURL:nsurl];
[_webview loadRequest:nsrequest];
[self.view addSubview:_webview];
Try like this,
NSDictionary *param = #{#"schoolid":#"schooldb1",
#"token":del.tokenString,
#"mobile":del.phoneString
};
NSLog(#"param:%#",param);
NSString *url=#"https://24x7tracker.com/School/AppSingleTrack";
NSString *finalurl=[NSString stringWithFormat:#"https://24x7tracker.com/School/AppSingleTrack/"];
NSURL *nsurl=[NSURL URLWithString:finalurl];
NSMutableURLRequest *nsrequest=[NSMutableURLRequest requestWithURL:nsurl];
NSData *data = [NSJSONSerialization dataWithJSONObject:param options:0 error:nil];
[nsrequest setHTTPBody:data];
[_webview loadRequest:nsrequest];
[self.view addSubview:_webview];
set request's necessary properies if require like [nsrequest setHTTPMethod:#"GET"]; or POST and contentType etc.
You should use AFNetworking, It will make it more easier.
Use this Code,
NSString *sUrl = #"https://24x7tracker.com/School/AppSingleTrack";
NSMutableURLRequest *res = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:sUrl]];
[res setHTTPMethod:#"POST"];
NSDictionary *params; = [NSDictionary dictionaryWithObjectsAndKeys:
#"schooldb1",#"schoolid",
del.tokenString,#"token",
del.phoneString,#"mobile",
nil];
NSMutableArray *pairArray = [[NSMutableArray alloc] initWithCapacity:0];
for (NSString *key in params)
[pairArray addObject:[NSString stringWithFormat:#"%#=%#", key, params[key]]];
[res setHTTPBody:[[pairArray componentsJoinedByString:#"&"] dataUsingEncoding:NSUTF8StringEncoding]];
[NSURLConnection sendAsynchronousRequest:res
queue:[NSOperationQueue mainQueue]
completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) {
NSLog(#"request URL : %#",res.URL);
NSLog(#"request Method : %#",res.HTTPMethod);
NSLog(#"parameters : %#",params);
NSLog(#"response : %#",response);
Resp *r = [ [Resp alloc] initWithDictionary:[NSJSONSerialization JSONObjectWithData: data options: NSJSONReadingMutableContainers error:nil]];
// Success - Show Sucess message
if ([r.sCode isEqualToString:#"success"]) {
NSLog(#"response message : %#",r.sData);
}
}];
Use the Class Resp:
Resp.h
#import <Foundation/Foundation.h>
#interface Resp : NSObject
#property (nonatomic, copy) NSString *sCode;
#property (nonatomic, copy) NSString *sMessage;
#property (nonatomic, copy) NSString *sData;
- (id)initWithDictionary:(NSDictionary *)dictionary;
#end
Resp.m
#import "Resp.h"
#implementation Resp
#synthesize sCode = _id;
#synthesize sMessage = _title;
#synthesize sData = _data;
- (id)initWithDictionary:(NSDictionary *)dictionary {
self = [super init];
if (self) {
self.sCode = [dictionary objectForKey:#"code"];
self.sMessage = [dictionary objectForKey:#"message"];
self.sData = [dictionary objectForKey:#"data"];
}
return self;
}
#end
then finally get the response, hope its helpful
Firstly, talk to your colleague or check the documents of the URL, to confirm what format of parameters the API needs, and the Request method, such as GET or POST.
Secondly, concatenate the params to the proper format, and don't forget escape the parameters.
If your URL need parameters as normal, try these:
NSDictionary *params = #{#"schoolid" : #"",
#"token" : #"",
#"mobile" : #""};
NSMutableArray *keyValues = [NSMutableArray array];
for (NSString *key in params) {
[keyValues addObject:[NSString stringWithFormat:#"%#=%#&", key, params[key]]];
}
NSString *paramsString = [keyValues componentsJoinedByString:#"&"];
paramsString = [paramsString stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];
// Don't add / at last unless the URL has, because / is another path
NSString *baseURL = #"https://24x7tracker.com/School/AppSingleTrack";
// If GET, you can use these two lines, or use below
// NSString *urlString=[NSString stringWithFormat:#"%#?%#", baseURL, paramsString];
// NSURLRequest *request=[NSURLRequest requestWithURL:[NSURL URLWithString:urlString]];
// if POST
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:baseURL]];
request.HTTPMethod = #"POST"; // Default is GET, you can send get request by default,
request.HTTPBody = [paramsString dataUsingEncoding:NSUTF8StringEncoding];
[webView loadRequest:request];
Edit:
According to #Shubhank's guess, if the webview's request via ajax, you should confirm the function of javascript, and try these codes in webview's delegate webViewDidFinishLoad:
- (void)webViewDidFinishLoad:(UIWebView *)webView {
[webView stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:#"javascriptFunction(%#, %#, %#)", param1, param2, param3]];
}

delegate method cannot callback

delegate method cannot callback
This is my .h file
#protocol ServiceAPIDelegate <NSObject>
#optional
- (void) onRequestLoginFinish:(NSDictionary*) dict;
#end
#interface ServiceAPI : NSObject
+ (id)shareAPI;
#property (nonatomic, weak) id <ServiceAPIDelegate> delegate_service;
;
#end
and this is .m file, i use ASIFORMData request and it is callback to requestFinished after get a response from server. but ater that, i want to send data to myviewcontroler use [self.delegate_service onRequestLoginFinish:result]; after this line. my program run normaly not bugs, not callback to function. I cannot see where errors are.
- (void) requestLoginWithUserName:(NSString*) username andPassWord:(NSString*) password {
NSString* urlString = [PublicInstance API_LOGIN];
NSArray *keys = PARAMS_ARRAY;
NSArray *objects = [NSArray arrayWithObjects:username, password, [#((int)En) stringValue], APPID, [PublicInstance getDevideID], DEVIDEOS, nil];
NSMutableDictionary *dict = [NSMutableDictionary dictionaryWithObjects:objects forKeys:keys];
NSString* signData = [PublicInstance signData:dict];
[dict setObject:signData forKey:signKey];
ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:[NSURL URLWithString:urlString]];
[request addRequestHeader:#"Content-Type" value:#"application/json"];
[request setValidatesSecureCertificate:NO];
[request setRequestMethod:#"POST"];
NSData *jsonDataToPost = [NSJSONSerialization dataWithJSONObject:dict options:0 error:nil];
[request appendPostData:jsonDataToPost];
[request startAsynchronous];
[request setDelegate:self];
}
- (void)requestFinished:(ASIHTTPRequest *)request
{
NSError* error = [request error];
if(!error) {
NSString* responseString = [request responseString];
NSDictionary *result = [NSJSONSerialization JSONObjectWithData;
[self.delegate_service onRequestLoginFinish:result];
}else{
NSLog(#"%#", [error description]);
}
}
ServiceAPI *ShareServiceAPI;
- (id) init {
if ([self init]) {
ShareServiceAPI = [ServiceAPI shareAPI];
ShareServiceAPI.delegate_service =self;
}
}
- (void) requestLoginWithUserInfor:(UserInfor*) _userinfor {
[ShareServiceAPI requestLoginWithUserName:_userinfor.username andPassWord:_userinfor.password];
}
#####################
and this is delegate method - but never callback (O^-oO)
- (void) onRequestLoginFinish:(NSDictionary *)dict {
if ([[dict objectForKey:Key_Status] intValue] == 1) {
NSLog(#"login successful");
}
else {
NSLog(#"login fail....");
}
}
Could anyone please help me?. Thank you for your time
You should always check if the delegate is nil or not and also check if the delegate responds to the selector as :
if(self.delegate_service){
if([self.delegate_service repondsToSelector:#selector(onRequestLoginFinish:)]){
[self.delegate_service onRequestLoginFinish:result];
}
}
Through the way you can make your program safe and found the reason that the method is not called.

The correct way asynchronously call an object?

I have hobbled together one of my first objects. The goal of the object is to send a text message, which is does. However I'm calling it from the 2nd UIViewController within ViewDidLoad, and its still hanging within the Segue transition. So I know I need to get it asynchronously, but reading some other threads they implied that the proper way to go around it is to make it an "AppDelegate Object", so I would assume I would need to call the object from the AppDelegate, but I'm not really sure about how to go about that as I have not really worked with that in some tutorials I'm doing, and on top of that, is that the correct way to go about using my object?
initializing the object from my view controller
Twilio *twilio = [[Twilio alloc] init];
[twilio sendMessage: self.phoneNumber: [self getRandomNumberBetween:1000 to:9999]];
Header file
#import <Foundation/Foundation.h>
#interface Twilio : NSObject
#property (strong, nonatomic) NSString *TwilioSID;
#property (strong, nonatomic) NSString *TwilioSecret;
#property (strong, nonatomic) NSString *FromNumber;
#property (strong, nonatomic) NSString *ToNumber;
#property (strong, nonatomic) NSString *Message;
-(id)init;
-(id)sendMessage:(NSString *)phoneNumber :(NSString *)message;
#end
Implementation file
#import "Twilio.h"
#implementation Twilio
-(id)init {
self = [super init];
if(self) {
// Twilio Common constants
self.TwilioSID = #"A....3";
self.TwilioSecret = #"e...8";
self.FromNumber = #"5...2";
self.ToNumber = nil;
self.Message = nil;
}
return self;
}
-(id)sendMessage:(NSString *)phoneNumber :(NSString *)message
{
NSLog(#"Sending request.");
self.ToNumber = phoneNumber;
self.Message = message;
// Build request
NSString *urlString = [NSString stringWithFormat:#"https://%#:%##api.twilio.com/2010-04-01/Accounts/%#/SMS/Messages", self.TwilioSID, self.TwilioSecret, self.TwilioSID];
NSURL *url = [NSURL URLWithString:urlString];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:url];
[request setHTTPMethod:#"POST"];
// Set up the body
NSString *bodyString = [NSString stringWithFormat:#"From=%#&To=%#&Body=%#", self.FromNumber, self.ToNumber, self.Message];
NSData *data = [bodyString dataUsingEncoding:NSUTF8StringEncoding];
[request setHTTPBody:data];
NSError *error;
NSURLResponse *response;
NSData *receivedData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
// Handle the received data
if (error) {
NSLog(#"Error: %#", error);
} else {
NSString *receivedString = [[NSString alloc]initWithData:receivedData encoding:NSUTF8StringEncoding];
NSLog(#"Request sent. %#", receivedString);
}
return self.Message;
}
#end
Updated
With recommendation below I changed my object implementation like so:
//NSError *error;
//NSURLResponse *response;
//NSData *receivedData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
[NSURLConnection sendAsynchronousRequest:request queue:self.queue completionHandler:^(NSURLResponse *response, NSData *data, NSError
*error) {
// Handle the received data
if (error) {
NSLog(#"Error: %#", error);
} else {
NSString *receivedString = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
NSLog(#"Request sent. %#", receivedString);
}
NSLog(#"%#",response);
}];
Use method sendAsynchronousRequest:queue:completionHandler:
See it : https://stackoverflow.com/a/9270711/2828120

NSURLConnection delegate methods

I am using a button action to update the value of a MySQL table field. The update is perform in the web server, but I need to update a UILabel text in my view Controller.
This is the code I have implemented:
- (IBAction)votarAction:(id)sender {
//URL definition where php file is hosted
dispatch_queue_t backgroundQueue = dispatch_queue_create("com.mycompany.myqueue", 0);
dispatch_async(backgroundQueue, ^{
int categoriaID = [[detalleDescription objectForKey:#"idEmpresa"] intValue];
NSString *string = [NSString stringWithFormat:#"%d", categoriaID];
NSLog(#"ID EMPRESA %#",string);
NSMutableString *ms = [[NSMutableString alloc] initWithString:#"http://mujercanariasigloxxi.appgestion.eu/app_php_files/cambiarvaloracionempresa.php?id="];
[ms appendString:string];
// URL request
NSLog(#"URL = %#",ms);
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:ms]];
//URL connection to the internet
NSURLConnection *connection=[[NSURLConnection alloc]initWithRequest:request delegate:self];
dispatch_async(dispatch_get_main_queue(), ^{
//update your label
});
});
}
#pragma NSURLConnection Delegate Methods
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
//buffer is the object Of NSMutableData and it is global,so declare it in .h file
buffer = [NSMutableData data];
NSLog(#"ESTOY EN didReceiveResponse*********");
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
NSLog(#"ESTOY EN didReceiveDATA*********");
[buffer appendData:data];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
//Here You will get the whole data
NSLog(#"ESTOY EN didFINISHLOADING*********");
NSError *jsonParsingError = nil;
NSArray *array = [NSJSONSerialization JSONObjectWithData:buffer options:0 error:&jsonParsingError];
//And you can used this array
NSLog(#"ARRAY = %#",array);
//HERE LABEL.TEXT UPDATE CODE
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
NSLog(#"ERROR de PARSING");
NSLog(#"ESTOY EN didFAILWITHERROR*********");
}
As I told you, the field value at the MySQL table is updated every time the button is tapped, but the problem is that the NSURLConnection delegate methods are never called.
Any help is welcome
In your view controller's header file add: <NSURLConnectionDelegate>
Also, there's no need to throw the NSURLConnection into a seperate background process, maybe that's why the delegates aren't called. NSURLConnection is already asynchronous
Perhaps try something like this:
- (IBAction)votarAction:(id)sender
{
int categoriaID = [[detalleDescription objectForKey:#"idEmpresa"] intValue];
NSString *originalString = [NSString stringWithFormat:#"%d", categoriaID];
NSMutableString *mutablesString = [[NSMutableString alloc] initWithString:#"http://mujercanariasigloxxi.appgestion.eu/app_php_files/cambiarvaloracionempresa.php?id="];
[mutableString appendString:originalString];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:mutableString]];
request.cachePolicy = NSURLRequestReloadIgnoringLocalAndRemoteCacheData;
request.timeoutInterval = 5.0;
[NSURLConnection sendAsynchronousRequest:request
queue:[NSOperationQueue mainQueue]
completionHandler:
^(NSURLResponse *response, NSData *data, NSError *connectionError)
{
if (data)
{
NSArray *array = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
dispatch_async(dispatch_get_main_queue(), ^
{
// Update your label
self.label.text = [array objectAtIndex:someIndex];
});
}
else
{
// Tell user there's no internet or data failed
}
}];
}

ios parsing json result after http request

am starting to build login form reading from external server via http request i need to parse json result to get user name
- (IBAction)getlogin:(UIButton *)sender {
NSString *rawStrusername = [NSString stringWithFormat:#"username=%#",_username.text];
NSString *rawStrpassword = [NSString stringWithFormat:#"password=%#",_password.text];
NSString *post = [NSString stringWithFormat:#"%#&%#", rawStrusername, rawStrpassword];
// NSString *post = #"rawStrusername&rawStrpassword";
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
/* NSString *postLength = [NSString stringWithFormat:#"%d", [postData length]]; */
NSURL *url = [NSURL URLWithString:#"http://www.othaimmarkets.com/my_services_path/user/login.json"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:#"POST"];
/* [request setValue:postLength forHTTPHeaderField:#"Content-Length"]; */
[request setValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Content-Type"];
[request setHTTPBody:postData];
NSURLResponse *response;
NSError *err;
NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&err];
NSLog(#"responseData: %#", [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding]);
//NSLog(#"responseData: %#", responseData);
}
I get this result:
{"sessid":"g2ev7til6d750ducrkege0cbj2","session_name":"SESS02795057fe9e6b2fc0777bf4057b248f","user":{"uid":"617","name":"mohammed.abdelrasoul#gmail.com","mail":"mohammed.abdelrasoul#gmail.com","mode":"0","sort":"0","threshold":"0","theme":"","signature":"","signature_format":"0","created":"1316602317","access":"1352643854","login":"1352666338","status":"1","timezone":"10800","language":"ar","picture":"","init":"mohammed.abdelrasoul#gmail.com","data":"a:5:{s:18:\"country_iso_code_2\";s:2:\"SA\";s:13:\"timezone_name\";s:11:\"Asia/Riyadh\";s:5:\"block\";a:1:{s:7:\"webform\";a:1:{s:15:\"client-block-88\";i:1;}}s:13:\"form_build_id\";s:37:\"form-3ae73833f08accc7abe5517347ea87eb\";s:7:\"contact\";i:0;}","country_iso_code_2":"SA","timezone_name":"Asia/Riyadh","block":{"webform":{"client-block-88":1}},"form_build_id":"form-3ae73833f08accc7abe5517347ea87eb","contact":0,"roles":{"2":"authenticated user"}}}
Or, formatted for the sake of legibility:
{
"sessid":"g2ev7til6d750ducrkege0cbj2",
"session_name":"SESS02795057fe9e6b2fc0777bf4057b248f",
"user":{
"uid":"617",
"name":"mohammed.abdelrasoul#gmail.com",
"mail":"mohammed.abdelrasoul#gmail.com",
"mode":"0",
"sort":"0",
"threshold":"0",
"theme":"",
"signature":"",
"signature_format":"0",
"created":"1316602317",
"access":"1352643854",
"login":"1352666338",
"status":"1",
"timezone":"10800",
"language":"ar",
"picture":"",
"init":"mohammed.abdelrasoul#gmail.com",
"data":"a:5:{s:18:\"country_iso_code_2\";s:2:\"SA\";s:13:\"timezone_name\";s:11:\"Asia/Riyadh\";s:5:\"block\";a:1:{s:7:\"webform\";a:1:{s:15:\"client-block-88\";i:1;}}s:13:\"form_build_id\";s:37:\"form-3ae73833f08accc7abe5517347ea87eb\";s:7:\"contact\";i:0;}",
"country_iso_code_2":"SA",
"timezone_name":"Asia/Riyadh",
"block":{
"webform":{
"client-block-88":1
}
},
"form_build_id":"form-3ae73833f08accc7abe5517347ea87eb",
"contact":0,
"roles":{
"2":"authenticated user"
}
}
}
how i can get the objects data or parse the result to get user name
any help or examples will be appreciated
You need to use the NSJSONSerialization class method, JSONObjectWithData:options:error: to create an NSDictionary:
NSError *error;
NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:responseData options:NSJSONReadingMutableContainers error:&error];
if (! error) {
NSLog(#"%#",jsonDict);
}else{
NSLog(#"%#",error.localizedDescription);
}
This will get you to the point where you can look at the dictionary, which will be easier to read. It looks like you need to use objectForKey:#"sessid" to get you to user, then objectForKey#"user", then objectForKey:#"name" to get you to the name.
Check out this framework for parsing json. https://github.com/stig/json-framework/
Also check out this answer iPhone/iOS JSON parsing tutorial. You'll find a link to a tutorial you can do to get acquainted with json parsing in ios.
See this answer and some code :
NSMutableData *data; // Contains data received from the URL connection declares in header
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)dataIn
{
// Do it this way because connection doesn't guarantee all the data is in
POLLog(#" Tide View connection");
[data appendData:dataIn];
}
- (void) connectionDidFinishLoading:(NSURLConnection *) conn
{
NSString *jsonString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSDictionary *results = [jsonString JSONValue]; // This is a new category added to the NSString by SBJSON
//100 parameters
for (int n=0;n<=100;n++)
{
// Get all the returned results
params[n] = [[results objectForKey:[NSString stringWithFormat:#"param%d",n]] floatValue];
}
To expand upon rdelmar's answer (which I think you should accept), you can use NSJSONSerialization and then navigate the NSDictionary results to extract the userName:
NSError *error;
NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:responseData
options:0
error:&error];
if (error == nil) {
NSDictionary *userDictionary = [jsonDict objectForKey:#"user"];
NSString *userName = [userDictionary objectForKey:#"name"];
// do what you need with the userName
} else {
NSLog(#"%#",error.localizedDescription);
}
Or if using the latest version of Xcode, you can replace those objectForKey references with the even more concise Modern Objective-C syntax:
NSDictionary *userDictionary = jsonDict[#"user"];
NSString *userName = userDictionary[#"name"];

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